AI Article Synopsis
- The study focused on co-digesting sewage sludge with hydrodynamically cavitated landfill leachate to assess efficiency in organics removal, biogas production, and digestate quality.
- A 5% v/v dose of treated leachate was tested over a 20-day hydraulic retention time, which resulted in improved biogas production and digestate quality.
- Analysis showed no new toxic compounds were created during co-digestion, suggesting this method is a safe and economical way to use mature landfill leachate.
Article Abstract
The main goal of this study was to investigate the co-digestion of sewage sludge and mature landfill leachate pretreated through hydrodynamic cavitation. The process efficiency was analyzed from the aspects of organics removal, biogas production, kinetics and digestate quality. Energy efficiency of the overall treatment was evaluated as well. A dose of hydrodynamically cavitated leachate of 5% v/v was used as a substrate for co-digestion with sewage sludge at a hydraulic retention time of 20 days. This improved the kinetics, biogas production and corresponding yields, as well as digestate quality. Fourier transform infrared photoacoustic spectroscopy analysis seemed to indicate that no new toxic compounds were formed with co-digestion. The investigated two-stage treatment is recommended as a safe and cost-effective method of utilizing mature leachate.
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| http://dx.doi.org/10.1016/j.wasman.2018.03.012 | DOI Listing |
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